Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 22 |
4 | 114 |
5 | 590 |
6 | 3066 |
7 | 15998 |
8 | 83786 |
9 | 440270 |
10 | 2320314 |
11 | 12260382 |
12 | 64931114 |
13 | 344562670 |
14 | 1831630106 |
15 | 9751275838 |
16 | 51981730186 |
17 | 277413656590 |
18 | 1481919831674 |
19 | 7922862005342 |
20 | 42388551182314 |
21 | 226923616315950 |
22 | 1215450062928346 |
[0,4,22,114,590,3066,15998,83786,440270,2320314, 12260382,64931114,344562670,1831630106,9751275838, 51981730186,277413656590,1481919831674, 7922862005342,42388551182314,226923616315950, 1215450062928346] |